英文别名17α-cyanomethyl-17β-hydroxy-estra-5(10),9(11)-dien-3-one 3-ethylene ketal; 17α-Hydroxy-3,3-[1,2-ethanediylbis(oxy)]-19-norpregna-5(10),9(11)-diene-21-nitrile; 2-[(8S,13S,14S,17R)-17-hydroxy-13-methylspiro[1,2,4,6,7,8,12,14,15,16-decahydrocyclopenta[a]phenanthrene-3,2'-1,3-dioxolane]-17-yl]acetonitrile; Dienogest EP Impurity D; Dienogest Impurity D; 19-Norpregna-5(10),9(11)-diene-21-nitrile, 3,3-[1,2-ethanediylbis(oxy)]-17-hydroxy-, (17α)-; Dienogest Impurity 7; Dinoregin Impurity D